package net.jeeshop.web.util;

import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;


public class CheckMobileUtil {

	// \b 是单词边界(连着的两个(字母字符 与 非字母字符) 之间的逻辑上的间隔),  
		// 字符串在编译时会被转码一次,所以是 "\\b"  
		// \B 是单词内部逻辑间隔(连着的两个字母字符之间的逻辑上的间隔)  
		static String phoneReg = "\\b(ip(hone|od)|android|opera m(ob|in)i"  
		        +"|windows (phone|ce)|blackberry"  
		        +"|s(ymbian|eries60|amsung)|p(laybook|alm|rofile/midp"  
		        +"|laystation portable)|nokia|fennec|htc[-_]"  
		        +"|mobile|up.browser|[1-4][0-9]{2}x[1-4][0-9]{2})\\b";  
		static String tableReg = "\\b(ipad|tablet|(Nexus 7)|up.browser"  
		        +"|[1-4][0-9]{2}x[1-4][0-9]{2})\\b";  
		
		//移动设备正则匹配：手机端、平板
		static Pattern phonePat = Pattern.compile(phoneReg, Pattern.CASE_INSENSITIVE);  
		static Pattern tablePat = Pattern.compile(tableReg, Pattern.CASE_INSENSITIVE);  
		  
		/**
		 * 检测是否是移动设备访问
		 * 
		 * @Title: check
		 * @Date : 2014-7-7 下午01:29:07
		 * @param userAgent 浏览器标识
		 * @return true:移动设备接入，false:pc端接入
		 */
		public static boolean check(String userAgent){  
		    if(null == userAgent){  
		        userAgent = "";  
		    }  
		    // 匹配  
		    Matcher matcherPhone = phonePat.matcher(userAgent);  
		    Matcher matcherTable = tablePat.matcher(userAgent);  
		    if(matcherPhone.find() || matcherTable.find()){  
		        return true;  
		    } else {  
		        return false;  
		    }  
		}

		/**
		 * 检查访问方式是否为移动端
		 * 
		 * @Title: check
		 * @Date : 2014-7-7 下午03:55:19
		 * @param request
		 * @throws IOException 
		 */
		public boolean check(HttpServletRequest request,HttpServletResponse response) throws IOException{
			boolean isFromMobile=false;
			
			HttpSession session= request.getSession();
	    //检查是否已经记录访问方式（移动端或pc端）
			if(null==session.getAttribute("ua")){
				try{
					//获取ua，用来判断是否为移动端访问
					String userAgent = request.getHeader( "USER-AGENT" ).toLowerCase();  
					if(null == userAgent){  
					    userAgent = "";  
					}
					isFromMobile=CheckMobileUtil.check(userAgent);
					//判断是否为移动端访问
					if(isFromMobile){
						System.out.println("移动端访问");
						session.setAttribute("ua","mobile");
					} else {
						System.out.println("pc端访问");
						session.setAttribute("ua","pc");
					}
				}catch(Exception e){}
			}else{
				isFromMobile=session.getAttribute("ua").equals("mobile");
			}
			
			return isFromMobile;
		}

}
